Model 3109
Biconical Antenna User Manual
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ETS-Lindgren Inc. reserves the right to make changes to any products herein to improve functioning or design. Although the information in this document has been carefully reviewed and is believed to be reliable, ETS-Lindgren does not assume any liability arising out of the application or use of any product or circuit described herein; nor does it convey any license under its patent rights nor the rights of others. All trademarks are the property of their respective owners.
© Copyright 1989–2016 by ETS-Lindgren Inc. All Rights Reserved. No part of this document may be copied by any means without written permission from ETS-Lindgren Inc.
Trademarks used in this document: The ETS-Lindgren logo is a registered trademark of ETS-Lindgren Inc.; Delrin is a registered trademark of E. I. du Pont de Nemours and Company.
Revision Record
MANUAL,3109 | Part #399038, Rev. J
Revision Description Date
A—C Initial Release; updates / edits 1989—2002
D Added P/XP options October, 2002
E Updated PX branding; updated Mounting Instructions; rebrand
February, 2009
F Updated Physical Specifications October, 2011
G Added optional 7/16 DIN connector August, 2015
H Added Model 3109P 7/16 and Model 3109PX 7/16
September, 2015
J Corrected electrical specifications May, 2016
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Table of Contents
Notes, Cautions, and Warnings ................................................ v 1.0 Introduction .......................................................................... 7
Application ..................................................................................................... 8 Optional Items ................................................................................................ 8
Portable Elements ................................................................................. 8 Extended Portable Elements ................................................................. 8 DIN Connector ....................................................................................... 9 Carrying Cases ...................................................................................... 9 Tripod Options ..................................................................................... 10
ETS-Lindgren Product Information Bulletin ................................................. 11 2.0 Maintenance ....................................................................... 13
Model Numbers ........................................................................................... 13 Service Procedures ..................................................................................... 14
Contacting ETS-Lindgren .................................................................... 14 Sending a Component for Service ....................................................... 14 Calibration Services and Annual Calibration ....................................... 14
3.0 Specifications ..................................................................... 15 Electrical Specifications ............................................................................... 15 Physical Specifications ................................................................................ 16
Model 3109 .......................................................................................... 16 Model 3109 With Portable Elements ................................................... 17 Model 3109 With Extended Portable Elements ................................... 18
4.0 Assembly Instructions ...................................................... 19 5.0 Mounting Instructions ....................................................... 21
Using Included Mounting Connectors .......................................................... 21 Additional Mounting Options ........................................................................ 22
4-TR Mounting Options........................................................................ 22 7-TR and Mast Mounting Options ........................................................ 23 2x2 Boom Mounting Options ............................................................... 24
6.0 Typical Data ........................................................................ 25 Model 3109 Typical Data ............................................................................. 25
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Model 3109 Antenna Factor ................................................................ 25 Model 3109 Gain ................................................................................. 26 Model 3109 VSWR .............................................................................. 27 Model 3109 Half-Power Beamwidth .................................................... 28 Model 3109 Forward Power @ 1 M–Derived from AF ......................... 29 Model 3109 Forward Power @ 3 M–Derived from AF ......................... 30 Model 3109 Forward Power @ 3 M–Measured over
Conducting Ground .............................................................................. 31 Model 3109 Forward Power @ 3 M–Measured over Ferrite Ground .. 32
Model 3109P Typical Data ........................................................................... 33 Model 3109P VSWR ............................................................................ 33
Model 3109PX Typical Data ........................................................................ 34 Model 3109PX Antenna Factor ........................................................... 34 Model 3109PX Gain ............................................................................. 35 Model 3109PX VSWR ......................................................................... 36 Model 3109PX Forward Power @ 3 M—Derived from AF .................. 37 Model 3109PX Forward Power @ 3 M—Measured over Conducting
Ground ................................................................................................. 38 Appendix A: Warranty ............................................................. 39
Duration of Warranties ................................................................................. 39
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Notes, Cautions, and Warnings
Note: Denotes helpful information intended to provide tips for better use of the product.
Caution: Denotes a hazard. Failure to follow instructions could result in minor personal injury and/or property damage. Included text gives proper procedures.
Warning: Denotes a hazard. Failure to follow instructions could result in SEVERE personal injury and/or property damage. Included text gives proper procedures.
Note: See the ETS-Lindgren Product Information Bulletin for safety, regulatory, and other product marking information.
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1.0 Introduction
The ETS-Lindgren Model 3109 Biconical Antenna is designed to operate over the 20 MHz to 300 MHz frequency range for generating high levels of electromagnetic (EM) fields. The ability to handle high power levels over a broadband makes the Model 3109 excellent for use in radiated susceptibility testing.
The assembly design of the Model 3109 provides for easy storage and portability. The standard biconical elements are made from welded aluminum. The 4-to-1 ratio balun network is fabricated from TFE thermoplastics and specially machined brass and aluminum support and contact parts. The bifilar inductors of the balun are wound in precision machined cuts to provide high barrier insulation between windings while simultaneously giving good coupling between bifilar windings.
The balun acts as base on the Model 3109 and is configured to accept an ETS-Lindgren tripod or most other tripods. For information on tripods, see Tripod Options on page 10. For the variety of mounting options available for the Model 3109, see Mounting Instructions on page 21.
The Model 3109 is individually calibrated at 1 m per SAE ARP 958 and 3 m and 10 m per ANSI C63.5. Actual factors and a signed Certificate of Calibration Conformance are included.
Because slight variations in testing environments can affect the field characteristics around an antenna, it is recommended that a field probe be used to accurately determine the field strength in the region under test.
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Application
The Model 3109 provides a broad frequency and a high input power, making it ideal for IEC 61000-4-3 testing. The antenna uses a modified Guanella balun for impedance transformation and matching, and it is constructed of much heavier materials so that maximum continuous input power can reach 2 kW. While this antenna typically has a high VSWR at frequencies below 70 MHz, it is still capable of generating high field strength with acceptable input power in this region of the band. The optional extended elements markedly improve performance in this region.
Optional Items
Note: For part number and ordering information, see Model Numbers on page 13.
PORTABLE ELEMENTS
Collapsible folding elements are available, making the Model 3109 portable and ideal for field use. Both the standard rigid and optional folding elements attach to the balun using screw mounts. This makes changing between the two types of elements quick and easy.
EXTENDED PORTABLE ELEMENTS
An extended version of the portable element is available. These folding elements are twice as long as the standard elements. The longer elements enable you to generate high fields at low frequencies with reduced applied power.
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DIN CONNECTOR
The standard connector for the Model 3109 is a Type N. As an alternative, the Model 3109 may be ordered with a 7/16 DIN connector.
Type N Connector (Standard)
7/16 DIN Connector (Optional)
CARRYING CASES
Carrying cases for biconical antennas and portable elements are available. Contact ETS-Lindgren for ordering information.
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TRIPOD OPTIONS
ETS-Lindgren offers the following non-metallic, non-reflective tripods for use at both indoor and outdoor EMC test sites. Contact ETS-Lindgren for ordering information.
4-TR Tripod—Constructed of linen phenolic and Delrin®, designed with an adjustable center post for precise height adjustments. Maximum height is 2.0 m (80.0 in), and minimum height is 94 cm (37.0 in). This tripod can support up to an 11.8 kg (26.0 lb) load.
7-TR Tripod—Constructed of PVC and fiberglass components, providing increased stability for physically large antennas. The unique design allows for quick assembly, disassembly, and convenient storage. Allows several different configurations, including options for manual or pneumatic polarization. Quick height adjustment and locking wheels provide ease of use during testing. Maximum height is 2.17 m (85.8 in), with a minimum height of 0.8 m (31.8 in). This tripod can support a 13.5 kg (30 lb) load.
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ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren Product Information Bulletin included with your shipment for the following:
Warranty information
Safety, regulatory, and other product marking information
Steps to receive your shipment
Steps to return a component for service
ETS-Lindgren calibration service
ETS-Lindgren contact information
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2.0 Maintenance
CAUTION: Before performing any maintenance, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment.
WARNING: Maintenance of the Model 3109 is limited to external components such as cables or connectors.
If you have any questions concerning maintenance, contact ETS-Lindgren Customer Service.
Model Numbers
Note: ETS-Lindgren may substitute a similar part or new part number with the same functionality for another part/part number. Contact ETS-Lindgren for questions about part numbers and ordering parts.
Following are the part numbers for ordering the different versions of the Model 3109 Biconical Antenna.
Part Description Part Number
Model 3109 3109
Model 3109 with portable elements 3109P
Model 3109 with extended portable elements 3109PX
Model 3109 with 7/16 DIN connector 3109 7/16
Model 3109 with 7/16 DIN connector and portable elements
3109P 7/16
Model 3109 with 7/16 DIN connector and extended portable elements
3109PX 7/16
WARRANTY
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Service Procedures
CONTACTING ETS-LINDGREN
Note: Please see www.ets-lindgren.com for a list of ETS-Lindgren offices, including phone and email contact information.
SENDING A COMPONENT FOR SERVICE
For the steps to return a system or system component to ETS-Lindgren for service, see the Product Information Bulletin included with your shipment.
CALIBRATION SERVICES AND ANNUAL CALIBRATION
Note: If you have the Model 3109 with portable elements or with extended portable elements, include the portable elements with the balun when sending for calibration.
See the Product Information Bulletin included with your shipment for information on ETS-Lindgren calibration services.
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3.0 Specifications
Electrical Specifications
Frequency Range: 20 MHz–300 MHz
VSWR Ratio (Average): 1.9:1
Maximum Continuous Power: 1 kW (N) 1.5 kW (7/16 DIN)
Peak Power: 2 kW
Impedance (Nominal): 50 Ω
Connector: Standard: Type N female
Optional: 7/16 DIN (must be specified at time of purchase)
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Physical Specifications
MODEL 3109
Note: One element is shown for illustrative purposes only; all specifications are based on the balun plus both elements.
Width (includes elements and balun): 131.1 cm (51.6 in)
Diameter: 51.1 cm (20.1 in)
Weight (includes elements and balun): 2.6 kg (5.8 lb)
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MODEL 3109 WITH PORTABLE ELEMENTS
Note: One element is shown for illustrative purposes only; all specifications are based on the balun plus both elements.
Width (includes elements and balun): 120.9 cm (47.6 in)
Diameter: 64.1 cm (25.3 in)
Weight (includes elements and balun): 2.4 kg (5.4 lb)
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MODEL 3109 WITH EXTENDED PORTABLE ELEMENTS
Note: One element is shown for illustrative purposes only; all specifications are based on the balun plus both elements.
Width (includes elements and balun): 223.0 cm (87.8 in)
Diameter: 123.3 cm (48.6 in)
Weight (includes elements and balun): 3.1 kg (6.8 lb)
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4.0 Assembly Instructions
CAUTION: Before connecting any components, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment.
The Model 3109 Biconical Antenna is shipped unassembled, and includes these parts:
Balun
Biconical element (2)
Belleville washer (2)
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To assemble the Model 3109:
1. Slide a belleville washer onto the threaded screw end of one of the biconical elements.
2. Line up the screw threads with the receptacle hole on the balun and turn the biconical element until it is firmly secured in the balun.
Caution: Do not cross thread this connection or permanent damage to the joint could occur.
3. Repeat step 1 and step 2 using the remaining washer and biconical element.
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5.0 Mounting Instructions
CAUTION: Before connecting any components, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment.
Caution: The Model 3109 is a precision measurement device. Handle with care.
Using Included Mounting Connectors
The Model 3109 Biconical Antenna balun includes two 1/4–20 thread connectors for mounting; one each is located on two sides of the balun base. To mount the Model 3109 onto a tripod, insert a 1/4–20 thread mounting screw or knob from the tripod into the desired mounting connector.
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Additional Mounting Options
4-TR MOUNTING OPTIONS
Following are additional options for mounting the Model 3109 onto an ETS-Lindgren 4-TR Tripod. Contact the ETS-Lindgren Sales Department for information on ordering optional mounting hardware.
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7-TR AND MAST MOUNTING OPTIONS
Following are options for mounting the Model 3109 onto an ETS-Lindgren 7-TR Tripod or mast. Contact the ETS-Lindgren Sales Department for information on ordering optional mounting hardware.
Note: Mast refers to 2070 Series, 2075, and 2175 Antenna Towers. 7-TR refers to these booms:
109042 boom—Straight boom; for general antenna mounting on a 7-TR
108983 boom—Offset boom; for general antenna mounting on a 7-TR with pneumatic or manual polarization; can also be used to mount stinger-type antennas
118947 – for stinger-type antennas only
108507 boom—Centerline rotation boom for Model 3106 Series antennas only; when changing polarization, maintains centerline rotation
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2X2 BOOM MOUNTING OPTIONS
Following are additional options for mounting the Model 3109 onto a 2x2 boom. Contact the ETS-Lindgren Sales Department for information on ordering optional mounting hardware.
Note: 2x2 boom refers to a typical 2-inch by 2-inch boom.
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6.0 Typical Data
Model 3109 Typical Data
MODEL 3109 ANTENNA FACTOR
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MODEL 3109 GAIN
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MODEL 3109 VSWR
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MODEL 3109 HALF-POWER BEAMWIDTH
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MODEL 3109 FORWARD POWER @ 1 M–DERIVED FROM AF
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MODEL 3109 FORWARD POWER @ 3 M–DERIVED FROM AF
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MODEL 3109 FORWARD POWER @ 3 M–MEASURED OVER CONDUCTING GROUND
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MODEL 3109 FORWARD POWER @ 3 M–MEASURED OVER FERRITE GROUND
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Model 3109P Typical Data
MODEL 3109P VSWR
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Model 3109PX Typical Data
MODEL 3109PX ANTENNA FACTOR
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MODEL 3109PX GAIN
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MODEL 3109PX VSWR
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MODEL 3109PX FORWARD POWER @ 3 M—DERIVED FROM AF
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MODEL 3109PX FORWARD POWER @ 3 M—MEASURED OVER CONDUCTING GROUND
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Appendix A: Warranty
Note: See the Product Information Bulletin included with your shipment for the complete ETS-Lindgren warranty for your Model 3109.
Duration of Warranties
All product warranties, except the warranty of title, and all remedies for warranty failures are limited to two years.
Product Warranted Duration of Warranty Period
Model 3109 Biconical Antenna
Model 3109P Biconical Antenna
Model 3109PX Biconical Antenna
Model 3109 7/16 Biconical Antenna
Model 3109P 7/16 Biconical Antenna
Model 3109PX 7/16 Biconical Antenna
2 Years
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